Boiler



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4 Sheets-Sheet 1 J. M. MCCLELLON BOILER Original Filed Sept. 29 1915 A iwf P w x I u w |l i H\. r ,W R .1.. mw @l 0 MM w am M@ @u y, i@\w\ s ilfQi1@, @lsfi Mw mt mm mn 0M .GGW r? \v mw @t o 0 6 0 mw n H MMM 'WQ 13, H923 Nov. 13, w23. @Afm-,115@

J. M. MCCLELLON l v BOILER Original Filed Sept. 29 1915 4 Sheets-Shee'l 2 Flgyw?.

a M /y BOILER Original Filed Sept. 29. 1915 4 Sheets-Sheet 3 Nwm 113 H923.

J. M. MCCLELLON BOILER Original Filed Sept, 29, 1915 4 SheetS-Sheet 4 GXx Y ima/emana" Jam/@@SM ZW@ zwa,

Patented Nov. i3, M23.

La7/M5@ JAMES M, MCCLELLON, F EVERETT, MASSACHUSETTS; HAROLD B. MCCLELLON ADMIN- IESTEJATR 0F SAID JAMES M. MCCLELLON, DECEASED.

BDILER.

Application filed September 29, 1915, Serial No. 53,165. Renewed. April i1, 1923.A

i l To all whom t may concern.'

' Be it known that l, JAMES M. MCCLnLLoN,

a citizen of the United States, and a resident of Everett, county of Middlesex, and State of Massachusetts, have invented an improvement in Boilers, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

rlhis Ainvention relates to fire-boxes and among other objects aims to provide a strong, simple, compact and eiicient firebox for locomotives.

The character of the invention may be best understood by reference t0 the following description of an illustrative embodiment thereof shown in the accompanying drawings, wherein,-

Fig. 1 is a vertical, longitudinal section through an illustrative fire-box embodying the invention;

Fig. 2 is a rear elevation of the construction shown in Fig. 1;

Fig. 3 is a horizontal line 3-3 of Fig. 2;

Fig. d is a horizontal section taken on line 4-4 of Figf2;

Fig. 5 is a vertical, transverse section taken on line 5-5 of Fig. l;

Fig. 6 is a side elevation of a portion of the barrel, crown drums and hollow mudrln ig. 7 is a. vertical detail section taken on line 7-7 of Fig. 8;

section taken on Fig. 8 is ahorizontal'detail sectionv taken y o n line 8--8 of Fig. 6; and

Fig. 9 is a vertical detail section taken on line 9-9 of Fig. 6.

Referring to the drawings, the illustrative construction shown therein as embodying the invention, comprises a barrel l (Figs. 1 and 7) containing the usual steam generating lues 3 and superheating tubes 5. The rear ends of said tubes and fines are expanded into apertures in a flue-sheet 7.

The illustrative crown of the fire-box comprises a central drum 9 and drums ll at the opposite sides thereof. The adjacent sides of the drums may be flattened somewhat and riveted or otherwise secured to-v gether, as well shown in Fig. 5. As appears from said figure the mating flattened sides or the drums are disposed in planes which thus the central drum sets in between the two lateral drums in the manner of the keystone of an arch and the entire crown chamber comprising the three drums is an arch-like construction, the drums corresponding to the voussoirs, and the lateral drums are supported by the side wall tubes 79 hereinafter referred to constituting lateral abutments. The exposed surfaces of the drums are cylindrical surfaces and thus well adapted to resist pressure and preferably, as clearly seen in Fig. 5, the lower portions extend downwardy substantially to a common tangent plane. provided a large heating surface at the under side of the crown chamber while the joining of the drums along the adjacent Hattened surfaces as described not only provides for a solid structure adapted to resist theV racking strains due to the locomotive passing over the road but permits the level of water in the crown to be lowered to a considerable degree without exposing any sur- 1ilace uncooled by water to the heat of the Heretofore the flue-sheet has been extend.

There is thus i therein. This made vit necessary to reduce the end portions of the drums adjacent said sheet to allow 'suiiicient flue-sheet .material between said drums, and to form the fluesheetto present flanges encircling said drums. rihe flanges were secured to said drums by rows of rivets extending throughout the circumferences thereof. The dieing out of the apertures, and the tting. shaping and riveting together ofthe parts made this construction costly to manufacture. Furthermore, if it was desired to remove the flue-sheet for purposes of \replacement or repair, it was necessary to remove all the rivets in the entire circumferences of the flue-sheet flanges surrounding the drums, and in reassembling it was necessary to fit the ends of the drums into the openings in l the flue-sheet and to repeat the operationof riveting t0 secure the same together.

One of the objects of the present invention is to provide a simple and effective construction which avoids the objections referred to.

To accomplish this the Hue sheet' may extend up to the crown drums and suitable means may be provided for closing the spaces between the drums and the upper edge of the flue sheet and the top of the barrel. As shown herein the drums have portions adjacent their ends formed to conform with one another and collectively cooperate to complete the closure of said spaces. For example,a the end portions of the central drum 9 adjacent the barrel may he pressed or otherwise formed to present lower corners 13 and upper corners 15. The end portions of the outer drums ll'adjacent the barrel may be pressed or otherwise formed to present lower corners 17 and upper corners 19. The corners 13 and 17 may have flat sides engaging one another, and the upper corners 15 and 19 may have flat sides engaging one another. The outer corners 17 of the side drums and the upper corners thereof may have sides preferably curved to conform to the contour i of the barrel l referred to. The side drums may have flattened portions 27 curved gradually inward, also to conform to the contour of the barrel. The flattened portions of the meeting drums may be riveted or otherwise secured together. Preferably, the corners have their points somewhat blunt or rounded. The spaces between them may be closed by fillers 29 welded therein. The lower corners of the drums may have flat under sides preferably substantially in the same plane.

The flue-sheet 7 may be extended upward and have a flange 31 extending away from the interior of the fire-box riveted or otherwise secured to said drums and forming a line of closure with said drums. It will'be seen that the crown drums collectively close a segment of the end of the barrel and the ilue sheet closes the barrel below this segment. ln the particular case illustrated this segment is a segment in the more restricted sense in that its base is a. chord of the circular end of the barrel but obviously the base might be other than a straight line.

Bv the above described construction. it will be apparent the flue-sheet may be readily removed without disturbing the -crown drums. and that any or all of the crown drums may be removed without disturbing the flue-sheet'. Also, there is a decided economv in the amount of material necessary to form the liuc-sheet. The reduction in the size of the flue-sheet reduces the area which is subjected to dilferent temperatures and reduces the likelihood of the cracking` thereof from stresses set up by temperature changes. As a result, the life of the sheet is prolonged.

The shaping of the crown drums to conform to the curvature of the barrel enables the drums to be inserted as a unit directly into the barrel'( Fig. 1). with margins overlapping the latter and secured thereto by rows of rivets 33 or otherwise as desired.

This direct connect-ion ofthe drums with the barrel eliminates the necessity of a wrapper orintermediate sheet to unite the drums with the barrel and provides an extremely strong, rigid, and compact construction.

Beneath the barrel and extending transversely to the longitudinal axis thereof,

. there may be provided a header 35 (Figs. 1,

6, 7 8 and 9) which may be riveted or otherwise secured to a flattened portion 37 (Fig. of the barrel.

This header may serve to assist in the closing of the space beneath the barrel and the bottom of the fire-box and to conduct water from the barrel to a hollow mud-ring to be referred to.

VVaterf'niay pass from the barrel to the header through registering apertures 39, in said flattened portion of the barrel and header. Adjacent the ends of the header, water legs-11 (Figs. 5, 6 and 9) may be provided having langes at their lower ends secured to said header and flanges at their upper ends secured to the barrel. These water legs serve to conduct water from the barrel to the header and also materially strengthen the connection between them.

The curved sides and bottom of the flue sheet may have a flange 43 projecting away from the interior of the lire-box into the barrel and riveted or otherwise secured thereto.

The header may have depressions 45 (Figs. 1. 7 and 9) formed therein opposite to the driving wheels 47 of the locomotive. thereby permitting the header to be arranged closely adjacent to said wheels, but without, interference therewith.

Suitable means is provided for closing the spaces between the end portions of the drums adjacent the rear wall. To accomplish this the crown drums-may be pressed or otherwise formed to present corners 51. The inner corners of the adjacent` sides of the drums may have flat sides riveted or.

otherwise secured together. The under sides o f said .corners may be flat and lie substantially in one and the same plane. The rear ends of the crown drums may be closed by bumped heads 53, the outer drums being providedl with manholes having4 covers v55. The rear wall of the lire-box mav com.-

lill) prise a series of upright tubes 57 (Fig. 2) Y `having their upper ends reduced and expanded in apertures-jin the under sides of the crown drums. The lower ends of said tubes may be expanded in apertures in a hollow mud-ring 58, preferably-.'U-shaped iin form (Fig. 1)', and having a bottom 61` welded or otherwise secured therein and provided with a series of apertures opposite the tubes closed by removable plugs 62 tapped therein to permit access to saidl tubes for purposes of` replacement or repair.

- In the rear wall is a frame (Figs. 2. 3 and 4) having an elliptic-like door opening 63. The upper and lower margins of said` frame E ,dwindled are secured 'by stud bolts to upper'and lower g with the central crown drum by a series of short tubes 71 having reduced ends entered into apertures in said header and drum.

'lhe lower header 65 is connected to the hollow mud-ring 58 by a series of short tubes 73 having their upper ends reduced and expanded in apertures in the lower header, and their lower ends expanded in apertures in said mud-ring.

'lhe tubes 57, 71 and 73 may be connected by llers 75 welded thereto, so that the assembly of tubes and illers presents a wall forming in 'ed'ect an integral whole, but with the advantages ot expansion, contraction and tendency to retain its original shape, had from the tubular construction.,V

The union ot the crown drums with the rear wall as described. provides a strong` simple construction, and enables the use ot straight tubes of equal lengths at the sides of the tire-door trame, and straight tubes above and beneath said trarne. 'lhe expanding ot the ends of the tubes into apertures in the dat portions of the crown drums, may be very easily edected' and provides a connection which reduces the likelihood of leakage to a minimum.

lach of the side walls of the fire-box cornprises a series of large tubes 79 having their upper ends reduced and curved inward somewhat and entered and' expanded into apertures in the side crown drums. The lower ends of the tubes are reduced and entered into apertures in the hollow mudring 58 referred to.

Preferably the tubes are gradually reduced in length from the due-sheet to the rear wall. The portions of the mud-ring entending from said liuc-sheet to said rear wall., are inclined as well shown in Fig. 1. to conform to the lengthsof the tubes. The spaces between the side walls of the tubes may be closed by fillers 89 welded thereto, thereby forming a side wall which, in effect,

f is an integral whole. lhe side wall tubes adjacent `to the due-sheet may be connected to the barrel and the corner tubes ot the side and rear walls may M connected by fillers welded thereto.

'The outer faces of the side walls may be covered by asbestos or other appropriate material 87 (Fig. 2) which may protested by a cover plate 89.

plhe portions et the hollow mud-ring at the sides of the fire-box may extend to and beneath the header 35 and be termed to present enlard portions91 tlPig. 8) overlapping and riveted or otherwise secured to said header. 'lhe ends ot said side portions may be formed to present upturned lips 93 overlapping and riveted or otherwise secured to the outer face of the header 35, thereby contributing to the strength ot the connection between the parts.

'lo permit the water to flow from the header 35 into the hollow mud-ring, they may be provided with registering apertures 95 (Figs, 7,8 and 9). 'lhe front ends ol the side portions of the mud-ring may be closed by heads 97 welded or otherwise secured thereto. Plugs 99 tapped in said beads' may be removed to facilitate the cleaning of the mud-ring. rllhe ends of -the header 35 may be closed by. heads 101 welded or otherwise secured therein. Plugs 103 tapped into said heads may be removed to permit the cleaningof said header.

'lo close the triangular-like space between the lower wall oi the barrel and the upper wall of the header 35, there may be provided tiles 105 having grooves in their upper edges in which enter the heads of the circumferential row of rivets projecting outward from the barrel connecting the flue-sheet thereto. This will prevent the displacement of the u per ends of the tiles. 'lo revent dis p acement of the lower ends o the tiles a lip 107 (Fig. 1) may be formed onor be welded to and project upward slightly from the header 35 into grooves in the lower edges ot said tiles. v

'lo close the space between the side portions oiE the mud-ring beneath the headerq a plate 108 (Fig. 1) may be secured to and depend diagonally rearward from said header. A series of tiles 109 are supported on ribs 111 projecting upward from said plate and on an angle-bar H3 secured to said plate., The ribs 111 provide desirable air spaces between the tiles and the plate, thereby tending to prevent overheating ol the former.

A series of arch tubes 115 may be provided having their lower ends expanded into projections 117 (Figs. 1, 6 and 7) pressed outward at intervals from kthe inner wall of the header 35. The upper ends ot said arch tubes are curved and entered into the crown drums adjacent the rear wall. yl`he projections 117 and the curvature of the tubes enables the latter to be entered into the header and drums substantially at right angles to portions thereof, thereby contributing tothe strength and security ot the connection. The arch tubes have tiles thereon forming a baille wall for assisting combustion of the fuel and deflecting and prolonging the llame length from the grate to the due-sheet. The position of the grate is indicated by the broken line a-m in Fig. 1.

The crown drums may have extensions 119 (Fig. l) projecting therelrom into the barrel connected by 'stay rods 121- with the upper wall vof the barrel', thereby stl'ening the Hue-sheet.

The side walls, rear wall and crown drums provide a closure for the'fire-box composed substantially entirely of tubular elements,

which whenweldedtogether as described, have great strength as an assembly and effectively withstand the rack and tear which locomotive {ire-boxes necessarily experience.

The tubular elements are substantially of circular cross section and as a result the high pressure strain therein does not tend to distort them, but on the contrary tends to 4cause them to retain their original shape,

it being well known that pressure in a container tends to cause it to assume a form which is circular in cross section. Therefore strength of the drums and enables the use of an extremely strong and simple Hue sheet and rear wall construction.

The parts of the fire-box may be made and assembled at small expense and are not likely to get out of order and require repairs.

Having described one illustrative embodi- A ment of the invention without limiting the same thereto, what I claim as new and desire lto secure by Letters Patent, is

1. A boiler comprising, in combination, 'a barrel, crown drums side by side having end portions shaped to interit and collectivelyto closea segment of the end of said barrel anda Hue sheet having an edge {ittingl the lower 'parts of said end portions and closingv the barrel end below such segment.

2. A boiler comprising, in combination, a barrel, a crown chamber includlng a pluralityo'f drums placed side by side and hav- 'the' closure vvof Y th'e ing end portions collectively shaped to confform' to the curvature of the barrel and fitted' thereto and a Hue sheet completing barrel beneath said chamber.- e l l 1 3.oA boiler comprising,y in combination,

al barrel', crown' drums side by side having ;end portions shaped tointerfit and col1ectively lto close a segment of the end of said barrel, said .segment having a smooth lower edge, and lalue sheethaving 'a smooth upper edge fitting the lowerqparts 4of 'said endf i. portions: and l closing :the cbarrel end below .'lsuchrsegment.;

1 -4. A fire-box` comprising crown drums and a Hue sheet having an upper end shaped differently from ,theV body portionsv of-said drums, the latten-*having end f' portions formed to conform to the upper end of said sheet and collectively therewith constitut an end closure for the fire-box'. 5. A fire-box comprising a Hue sheet having a substantially straight upper end, and

crown drums placed side by side having end portions formed to conform to said straight upper end and collectively with said sheet constituting an end closure for I the fire-box.

6. A fire-box comprising crown drums, a Hue sheet and a rear wall both having upper ends shaped differently from the main body portions of said drums, the'latter having portions formed to conform to the upper ends of said sheet and wall and collectively therewith constituting end closures for the fire-box.

7. A- llire-box comprising crown drums having heads at the rear ends thereof, a Hue sheet and a rear wall both having upperVY terminals formed differently from the main body portions of said drums, the latter lOO crown drums having end portions shaped to conform to the contour of said barrel and secured directly to said barrel, and a Hue sheet terminating at the' bottoms of said drums and secured directly to 'said barrel and said drums.

l0. The combinati'on with a barrel of crown drums having end portions formed to Ht the contour of said barrel, and a Hue sheet formeditopt the contour of said barrel and terminating beneath and secured to the bottoms of lsaid drums.

11. The combination-withl a barrel of'a throat header extending transversely thereof directly beneath the same, directly secured thereto and vforming a'v substantial part of the rear -end closure of the'fire-box beneath the barrel," and means for closing the spaces betweenA the curved side'walls of Said barrel and 'the' top side portions of the header. c'

12;The combination lwith a barrel of a .mud ring vcloselyad-jacent the bottomo thereof; aheaderl extending transversely'pf said 'barrel' and secured Adirectlyte said mud 'ring and to said barrel, crown drums, and arch tubes extending from said header to said crown drums.

13. The combination with a barrel 1 of a header 35 extending transversely of said barrel beneath the same and formed to present projections 117, a plurality of crown drums, and arch tubes connected directly to said drums and projections.

14. In a fire-box the combination with a barrel 1 of a flue sheet 7 having a smooth terminal, crown drums 9 and 11 overlying said terminal having main body portions of inherent pressure resisting form, and means 15, 17 and 19 for closing spaces between said drums, sheet and barrel.

15. In a fire-box the combination with a barrel 1 of a flue sheet 7 having a smooth upper terminal, a rear wall comprising tubes 57 and 71 collectively presenting a smooth upper terminal, and crown drums above said flue sheet and rear wall having body portions of inherent pressure resisting shape and end closure means 15, 17, 19 and 51 for the spaces between said drums and terminals.

16. The combinationof a, barrel 1 with crown drums 9 and 11, a flue sheet 7 fitting said barrel and terminating at the under sides of said drums, and means 13, 15, 17 and 19 for closing spaces between said drums and the flue sheet and barrel.

17. In a fire-box a crown comprising a plurality of drums 9 and 11 having flattened s'rdes secured together and extruded portions 13, 1,5, 17 and 19 forming part of the end closure of the fire-box. v

18. fire-box for a boiler including a plurality of crown drums placed side by side and having closed rear ends distorted to provide flat abutting surfaces whereby the drums fit together in block-like manner and* form a unified, substantially continuous surface.

19. A. boiler fire-box having a water containing enclosing section comprising a plurality of hollow members each having a wall of substantially uniform thickness and having a rounded, pressure-resisting section, said members having closed end portions distorted to fit together in block-like manner to form a unified, substantiall continuous, marginal surface for the enc osing section.

20. A boiler comprising a barrel and a fire-box, the fire-box including crown drums communicating with the upper portion of said barrel and having closed rear ends, the lower portions of said drums at each end being distorted to fit together and present substantially straight lower boundaries, a flue sheet fitting one of said boundaries and cooperating with said drums to close the end of the barrel and a rear wall for the fire-box beneath the other said boundary and including water containing tubes in communication with said drums.

21. In a firebox a crown chamber coinprising a. plurality of generally cylindrical drums havingflattened sides fitting together in downwardly and inwardly converging planes vin the manner of voussoirs.

22. In a irebox a crown chamber comprising lateral drums having inner flattened sides disposed in inwardlv and downwardly converging planes and a central drum having flattened sides tting those of the lateral drums and received between them in the manner of a keystone.

23. In a firebox a crown chamber coinprising lateral drums having inner flattened sides disposed in inwardly and downwardly converging planes and a central drum having flattened sides fitting those of the lateral drums and received between them in the manner of a keystone, the lower portions of' said drums extending substantially in a common tangent plane.

24. In a firebox a crown chamber comprising a plurality of generally cylindrical drums having flattened sides fitting together in downwardly and inwardly converging planes in the manner of voussoirs and water-containing side walls supporting the lateral drums and providing lateral abutments.

25. In a firebox a crown chamber cornprising lateral drums having inner flattened sides disposed in inwardly and downwardly converging planes and a central drum having flattened sides fitting those of the lateral drum and received between them in the manner of a. keystone, the rear ends of the drums being distorted to fit together blocklike along said planes and provide a unified flat-sided lower margin for the rear end of the chamber.

26. In a firebox a crown chamber comprising lateral drums having inner flattened s'des disposed in inwardly and downwardly converging planes and a central drum having flattened sides fitting those of the lateral drums and received between them in the manner of a keystone, the forward ends of the drums being distorted to fit together block-like along said planes and collectively to form a segmental end portion for the chamber.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JAMES M. M CCLELLUN.

Witnesses:

HENRY 'll. WILLIAMS, Ronm H. Katamaran.. 

